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Last updated July 13, 2021

Connecticut LLC
Business Licenses and Permits

How to form an LLC in Connecticut
This Quick Start Guide is a brief overview of how to form an LLC in Connecticut.

Detailed Lessons:

5. EIN Number
6. Annual Report
7. Business Licenses ← you are here
8. Taxes


Connecticut LLC costs:
Connecticut state fee: $120 (one-time fee)
Annual report: $80 (every year)

Need help?
Hire a company to form your Connecticut LLC:
Northwest ($39 + state fee) or LegalZoom ($149 + state fee)

★ Check out Northwest vs LegalZoom

After your Connecticut LLC is approved, you’ll need to comply with state and local government license and permit requirements.

Your requirements are determined by the industry you are in and where your business is located.

Not complying with license and permit requirements is risky and can result in penalties and fines, or worse, not being allowed to conduct business in the state.

Types of licenses you may need in Connecticut

Below are some license and permits examples:

  • Department of Revenue State Tax ID number
  • Business operation license/business privilege license
  • Sales tax license
  • Seller/reseller permit
  • Building permit
  • Health permit
  • Signage permit
  • Home occupation permit
  • Zoning and land use permits
  • Withholding taxes (if you have employees)

Industries that are more regulated usually have more requirements.

Need Help? If you don’t want to make phone calls and determine the licensing requirements yourself, we recommend using IncFile.

Do it yourself in Connecticut

CT Department of Revenue State Tax ID Number

Because you are operating a business in Connecticut, you will need to register with the Department of Revenue and get a CT State Tax Identification Number.

You can register with the Department of Revenue online through the Taxpayer Service Center. Most businesses do so using Form REG-1. However, some licenses (like those for alcohol, tobacco, or nursing homes) require additional documents that you can find in the Registration Applications page.

You can contact the Department of Revenue with any questions at 860-297-5962, or visit their contact page for additional information.

Sales and Use Tax Permit

A Sales and Use Tax Permit from the Department of Revenue Services (DRS) is needed for the following activities in Connecticut:

  • Sale, rental, or lease of goods
  • Sale of a taxable service
  • Operation of a hotel, motel, or lodging house

Advance CT (formerly the Connecticut Economic Resource Center)

Advance CT provides helpful guides that discuss licensing requirements based on different industries. You can also discuss your licensing requirements with them by phone. Their phone number is 860-571-7136.

Note: There may be more places in Connecticut you need to contact.

Next Step: Connecticut LLC taxes

After you’ve researched and obtained the proper licenses and permits, you can then proceed to the next lesson: Connecticut LLC taxes.

Matt Horwitz
Founder & Educator, LLC University®
Matt Horwitz has been the leading expert on LLC education for the past decade. He founded LLC University in 2010 after realizing people needed simple and actionable instructions to start an LLC that other companies weren't offering. He's cited by Entrepreneur Magazine, Yahoo Finance, and the US Chamber of Commerce, and was featured by CNBC and InventRight.
Matt holds a Bachelor's Degree in business from Drexel University with a concentration in business law. He performs extensive research and analysis to convert state laws into simple instructions anyone can follow to form their LLC - all for free! Read more about Matt Horwitz and LLC University.

6 comments on “Connecticut Business Licenses and Permits”

Disclaimer: Nothing on this page shall be interpreted as legal or tax advice. Rules and regulations vary by location. They also change over time and are specific to your situation. Furthermore, this comment section is provided so people can share their thoughts and experience. Please consult a licensed professional if you have legal or tax questions.

  1. Hi do i need a sales tax permit if Im registered as a dba. Also do I need any permit or special license to run a carpet cleaning business.

    • Hi Edwin, you’ll need to check with your municipality regarding any special license. Connecticut does charge sales and use tax on some services, but that’s best to check with an accountant on. We don’t specialize in business licenses or sales take. Thanks for your understanding.

  2. Hi Matt. Thanks for all the step-by-step instruction!
    I filed for Connecticut LLC.
    I want to proceed to get EIN (and possibly skip LLC approval phase).
    My first client is asking for my W-9 form.
    Is that the CT Department of Revenue State Tax ID Number?
    Or how do I create the form?
    Thank you.

    • Hi Marianne, you’re welcome! What do you mean by “skip LLC approval phase”? No, a W-9 has nothing to do with your state tax ID number. Form W-9 is a federal form from the IRS. Those who pay your LLC as an independent contractor will send you a 1099 at the end of every January. They request this form, the W-9, so they know how to prepare their 1099. You can download the W-9 from the IRS. See here: IRS: About Form W-9.

      I’m going to assume you are the only Member of your LLC, therefore it’s a Single-Member LLC. By default, Single-Member LLCs are taxed by the IRS like a Sole Proprietor. If that’s the case, here are Form W-9 instructions:
      1. Name (as shown on your income tax return): Enter your full name.
      2. Business name/disregarded entity name: Enter your LLC name.
      3. Check off “Individual/sole proprietor or single-member LLC”.
      4. Exemptions likely don’t apply; can be left blank.
      5 + 6. Enter your LLC’s mailing address.
      7. Optional, may not apply.
      Then enter your LLC’s EIN Number (leave social security number blank), sign your name, and date. Hope that helps!

  3. I have a friend that is just starting up a home heating oil delivery company in Connecticut.
    I am trying to help with some questions, and one is does the owner need a Tradesmen Certification and how would they get that?

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